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s390: split TIF bits into CIF, PIF and TIF bits

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The oi and ni instructions used in entry[64].S to set and clear bits
in the thread-flags are not guaranteed to be atomic in regard to other
CPUs. Split the TIF bits into CPU, pt_regs and thread-info specific
bits. Updates on the TIF bits are done with atomic instructions,
updates on CPU and pt_regs bits are done with non-atomic instructions.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Martin Schwidefsky
2014-04-15 12:55:07 +02:00
parent beef560b4c
commit d3a73acbc2
16 changed files with 173 additions and 126 deletions
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2
arch/s390/kvm/kvm-s390.c
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@@ -906,7 +906,7 @@ static int vcpu_pre_run(struct kvm_vcpu *vcpu)
if (need_resched())
schedule();
if (test_thread_flag(TIF_MCCK_PENDING))
if (test_cpu_flag(CIF_MCCK_PENDING))
s390_handle_mcck();
if (!kvm_is_ucontrol(vcpu->kvm))